JP2000263058A - Electric desalting apparatus - Google Patents
Electric desalting apparatusInfo
- Publication number
- JP2000263058A JP2000263058A JP11068632A JP6863299A JP2000263058A JP 2000263058 A JP2000263058 A JP 2000263058A JP 11068632 A JP11068632 A JP 11068632A JP 6863299 A JP6863299 A JP 6863299A JP 2000263058 A JP2000263058 A JP 2000263058A
- Authority
- JP
- Japan
- Prior art keywords
- dilution
- water
- chambers
- electrode
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
Landscapes
- Treatment Of Water By Ion Exchange (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は電気脱塩装置に係
り、特に筒状の外側電極と、該外側電極の中心部に配置
された中心電極との間に複数の濃縮室と希釈室とを同軸
状に配設した電気脱塩装置に関する。詳しくは、本発明
は希釈水を複数の希釈室に直列に流通させるようにした
電気脱塩装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric desalination apparatus, and more particularly, to a plurality of concentration chambers and dilution chambers between a cylindrical outer electrode and a center electrode disposed at the center of the outer electrode. The present invention relates to an electric desalination apparatus coaxially arranged. More specifically, the present invention relates to an electric desalination apparatus that allows dilution water to flow in series through a plurality of dilution chambers.
【０００２】[0002]
【従来の技術】従来、液体中のイオン（又は塩分）を除
去する技術としては、蒸留、電気透析、逆浸透、イオン
交換などが知られている。近年、電気透析から派生した
技術として電気脱イオンが実用化されてきており、様々
な形状の電気脱イオン装置が特公平４−７２５６７号公
報、特公平６−２０５１３号公報、特開平７−３２８３
９５号公報、特開平９−２８５７９０号公報、特開平６
−７６４５号公報又は米国特許ＵＳ４，９６４，９７０
により公知となっている。2. Description of the Related Art Conventionally, distillation, electrodialysis, reverse osmosis, ion exchange, and the like are known as techniques for removing ions (or salts) in a liquid. In recent years, electrodeionization has been put to practical use as a technique derived from electrodialysis. Electrodeionization devices of various shapes have been disclosed in Japanese Patent Publication No. Hei 4-72567, Japanese Patent Publication No. Hei 6-20513, and Japanese Patent Laid-Open Publication No. Hei 7-3283.
No. 95, Japanese Patent Application Laid-Open No. 9-285790, Japanese Patent Application Laid-Open
No. 7645 or US Pat. No. 4,964,970
Has become known.
【０００３】[0003]
【発明が解決しようとする課題】特公平４−７２５６７
号公報の装置は、平膜状のイオン交換膜を交互に配設し
て濃縮室と希釈室を複数設置したものであり、水質を高
めるために、一つのモジュールに複数の電極対を直列に
設けて、水を濃縮室と希釈室とに多段に流す。特開平７
−３２８３９５号公報の装置は、一つのモジュールに複
数の電極対を並列に設け、濃縮水と希釈室を一段に通水
するものである。[Problems to be Solved by the Invention]
The apparatus disclosed in Japanese Patent Application Publication No. H10-20764 is provided with a plurality of concentrating chambers and a plurality of diluting chambers by alternately arranging flat membrane ion exchange membranes. And water is flowed in multiple stages to the concentration and dilution chambers. JP 7
In the device disclosed in Japanese Patent No. 328395, a plurality of electrode pairs are provided in parallel in one module, and the concentrated water and the dilution chamber are passed through one step.
【０００４】これらの電気脱塩装置では、複数の電極対
に印加する電圧及び電流を変化させ、後段での電流密度
を上げることにより水質を上げるようにしているが、複
数の直流電源及び電極対が必要である。In these electric desalination apparatuses, the quality of water is improved by changing the voltage and current applied to a plurality of electrode pairs and increasing the current density in a subsequent stage. is necessary.
【０００５】特公平６−２０５１３号公報の装置でも、
平膜状のイオン交換膜を交互に配設して濃縮室及び希釈
室を複数設置する。同号の電気脱塩装置は、一つの電極
対の間で希釈室を複数回通水することにより処理水性能
をあげるものであるが、一つの電極対にて希釈室を通水
するために、複数段の電流密度が同一となり、後段基準
の電流密度で通水すると、前段での限界電流密度を超え
る運転を起こす可能性があり、スケール等の発生を引き
起こし易い。[0005] In the device disclosed in Japanese Patent Publication No. Hei 6-20513,
A plurality of concentration chambers and dilution chambers are provided by alternately disposing flat ion exchange membranes. The electric desalination apparatus of the same issue improves the treated water performance by passing water through the dilution chamber a plurality of times between one pair of electrodes. If the current densities of a plurality of stages are the same and water is passed at the current density of the later stage reference, there is a possibility that operation exceeding the limit current density in the former stage may occur, and scale and the like are likely to occur.
【０００６】また、これらの電気脱イオン装置は、いず
れも、平膜状のイオン交換膜及び電極などを使用し、二
枚の電極の間に複数の希釈室、濃縮室を挟み込む構造と
なっており、水漏れや希釈室の濃縮室間の相互汚染を起
こすことが多い。Each of these electrodeionization apparatuses has a structure in which a flat membrane ion exchange membrane and electrodes are used, and a plurality of dilution chambers and concentration chambers are sandwiched between two electrodes. This often causes water leakage and cross-contamination between the concentration chambers of the dilution chamber.
【０００７】特開平９−２８５７９０号公報の装置で
は、同心円状の電極対、イオン交換膜を用いて、希釈室
にイオン交換体を充填し、脱塩する。同号の電気脱塩装
置は、濃縮室と希釈室とを複数設置した場合でも一段で
処理する構造となっているため、外周部の方では電流密
度が小さく、内周部の方が電流密度が大きくなる。この
ため、各希釈室の希釈水の線速度及び滞留時間が同じ場
合には、各室の処理水水質が異なってしまう。そして、
中心電極基準での電流密度を印加する場合には、外周電
極付近の希釈室の電流密度が低くなり、処理水性能が低
下する。逆に、外周電極基準での電流密度を印加する場
合には、水質によっては、中心電極付近の希釈室及び濃
縮室の電流密度が高くなり、スケールが多量に発生す
る。In the apparatus disclosed in Japanese Patent Application Laid-Open No. 9-285790, a dilute chamber is filled with an ion exchanger using a concentric electrode pair and an ion exchange membrane, and desalted. The electric desalination apparatus of the same type has a structure in which even if a plurality of concentration chambers and dilution chambers are installed, the treatment is performed in one step, so that the current density is smaller at the outer periphery and is smaller at the inner periphery. Becomes larger. For this reason, if the linear velocity and residence time of the dilution water in each dilution chamber are the same, the treated water quality in each chamber will be different. And
When a current density based on the center electrode is applied, the current density in the dilution chamber near the outer peripheral electrode is reduced, and the performance of the treated water is reduced. Conversely, when applying a current density on the basis of the outer electrode, the current density in the dilution chamber and the concentration chamber near the center electrode increases depending on the water quality, and a large amount of scale is generated.
【０００８】ＵＳ４，９６４，９７０の電気脱塩装置
は、希釈室流路をジグザグに設けることにより希釈水の
滞留時間を長くする構造となっている。この電気脱塩装
置に希釈水を大流量にて流すと、圧力損失が過大となる
ので、この電気脱塩装置は実用性が低い。The electric desalination apparatus of US Pat. No. 4,964,970 has a structure in which the residence time of dilution water is extended by providing a dilution chamber flow path in a zigzag manner. When dilution water flows at a large flow rate in this electric desalination apparatus, the pressure loss becomes excessively large, so that the electric desalination apparatus is not practical.
【０００９】特開平６−７６４５号公報の装置では、イ
オン交換膜及びイオン交換樹脂又はスペーサを螺旋状に
巻き、その中心部分と外周部分に電極を設け、希釈室
を、外周部分から中心部分に向って通水し、脱塩するも
のである。これは、外周側すなわち原水入口側は電流密
度が低く、中心部すなわち処理水出口付近に向かって電
流密度が高くなる構造となっているため、外周側で塩が
移動している際にＨ+やＯＨ-の生成が少ないため、スケ
ールが発生しにくい。また、内周側で電流速度が高くな
るので、Ｈ+やＯＨ-の発生が促進され、水質が良くなる
メリットがある。しかし、構造上、平膜型のような積層
が難しいため、電極が処理流量に比べて大きくする必要
がある。In the apparatus disclosed in Japanese Patent Application Laid-Open No. 6-7645, an ion exchange membrane and an ion exchange resin or spacer are spirally wound, electrodes are provided at the central portion and the outer peripheral portion, and the dilution chamber is moved from the outer peripheral portion to the central portion. The water is passed to it and desalted. This is because the current density is low on the outer circumference side, that is, on the raw water inlet side, and the current density increases toward the center part, that is, near the treated water outlet, so that H + and OH - for generation is less of, scale is less likely to occur. Moreover, the current speed is higher at the inner circumferential side, H + and OH - generation is accelerated, there is a merit that water quality is improved. However, since it is difficult to form a stack such as a flat film type, it is necessary to increase the size of the electrode compared to the processing flow rate.
【００１０】本発明は、筒状の外側電極と中心部の中心
電極との間に複数の濃縮室及び希釈室を配設した電気脱
塩装置において、希釈水を２以上の希釈室に流通させる
と共に、後段側の希釈室の電流を密になるように構成す
ることにより水質を向上させることができる比較的簡易
な構成の電気脱塩装置を提供することを目的とする。According to the present invention, in an electric desalination apparatus in which a plurality of concentration chambers and dilution chambers are disposed between a cylindrical outer electrode and a central electrode at the center, dilution water flows through two or more dilution chambers. In addition, an object of the present invention is to provide an electric desalination apparatus having a relatively simple configuration capable of improving the water quality by configuring the dilution chamber on the downstream side to have a high current.
【００１１】[0011]
【課題を解決するための手段】本発明の電気脱塩装置
は、筒状の外側電極と、該外側電極の中心部に該外側電
極と同軸状に配置された中心電極と、該外側電極と中心
電極との間に複数のカチオン交換膜とアニオン交換膜と
を交互に同軸状に配列することにより交互に同軸状に形
成された複数の濃縮室及び希釈室とを備えた電気脱塩装
置において、該外側電極側の希釈室からの流出水をそれ
よりも内側の希釈室に流すように少なくとも２つの希釈
室を連通したことを特徴とするものである。According to the present invention, there is provided an electric desalination apparatus comprising: a cylindrical outer electrode; a center electrode disposed coaxially with the outer electrode at the center of the outer electrode; In an electric desalination apparatus having a plurality of concentration chambers and dilution chambers formed alternately coaxially by alternately coaxially arranging a plurality of cation exchange membranes and anion exchange membranes between the center electrode. At least two dilution chambers are connected to each other so that water flowing out of the dilution chamber on the outer electrode side flows into the dilution chamber on the inner side.
【００１２】かかる電気脱塩装置にあっては、希釈水
（例えば市水を逆浸透（ＲＯ）処理した水など）を直列
に複数の希釈室に流通させるが、後段側の希釈室は中心
電極により近接しており、当該希釈室内の電流密度が前
段側の希釈室におけるよりも大きく、従ってこの後段側
の希釈室内においてより強い脱イオン作用を受ける。こ
の結果、希釈水を電流密度の等しい複数の希釈室に順次
に流通させる場合に比べ、より高純度の脱イオン水が得
られる。In this electric desalination apparatus, dilution water (for example, water obtained by subjecting city water to reverse osmosis (RO) treatment) is passed in series to a plurality of dilution chambers. And the current density in the dilution chamber is higher than in the previous dilution chamber, so that a stronger deionization is effected in this latter dilution chamber. As a result, higher purity deionized water can be obtained as compared to a case where the dilution water is sequentially passed through a plurality of dilution chambers having the same current density.
【００１３】[0013]
【発明の実施の形態】図１は実施の形態に係る電気脱塩
装置の模式的な断面斜視図である。FIG. 1 is a schematic sectional perspective view of an electric desalination apparatus according to an embodiment.
【００１４】筒状の外側電極１の中心部に該外側電極１
と同軸状に中心電極２が配置されている。この実施の形
態では中心電極２も筒状となっているが、これは中実棒
状であっても良い。これらの電極１，２間に複数のカチ
オン交換膜３とアニオン交換膜４とが交互に配置され、
各交換膜３，４間にそれぞれ濃縮室５と希釈室６とが交
互に形成されている。希釈室６内にはイオン交換樹脂な
どのイオン交換体６Ａが充填されている。なお、濃縮室
５内に、導電性を高めるためのイオン交換体又は導電性
のスペーサを充填しても良い。The outer electrode 1 is provided at the center of the cylindrical outer electrode 1.
The center electrode 2 is arranged coaxially with the center electrode. In this embodiment, the center electrode 2 is also cylindrical, but it may be a solid rod. A plurality of cation exchange membranes 3 and anion exchange membranes 4 are alternately arranged between these electrodes 1 and 2,
Concentration chambers 5 and dilution chambers 6 are alternately formed between the exchange membranes 3 and 4, respectively. The dilution chamber 6 is filled with an ion exchanger 6A such as an ion exchange resin. The concentration chamber 5 may be filled with an ion exchanger or a conductive spacer for increasing conductivity.
【００１５】この実施の形態にあっては、外側電極１は
−電極であり、中心電極２は＋電極である。また、この
実施の形態にあっては、外側電極１とその直近のアニオ
ン交換膜４との間にカソード区画室１１が形成され、中
心電極２とその直近のカチオン交換膜３との間にアノー
ド区画室１２が形成されている。In this embodiment, the outer electrode 1 is a negative electrode, and the center electrode 2 is a positive electrode. Further, in this embodiment, a cathode compartment 11 is formed between the outer electrode 1 and the anion exchange membrane 4 immediately adjacent thereto, and the anode compartment 11 is formed between the center electrode 2 and the cation exchange membrane 3 immediately adjacent thereto. A compartment 12 is formed.
【００１６】濃縮室５は内側がカチオン交換膜３で構成
され、外側がアニオン交換膜４で構成されている。希釈
室６は内側がアニオン交換膜４で構成され、外側がカチ
オン交換膜３で構成されている。The concentration chamber 5 has a cation exchange membrane 3 on the inside and an anion exchange membrane 4 on the outside. The dilution chamber 6 has an anion exchange membrane 4 on the inside and a cation exchange membrane 3 on the outside.
【００１７】図示はしないが、それぞれ筒状の電極１，
２及びカチオン交換膜３、アニオン交換膜４の両端側に
リング状のパッキンが配置されている。各パッキンには
液の流通用の開口部が設けられている。Although not shown, cylindrical electrodes 1 and 2 are respectively provided.
A ring-shaped packing is disposed on both ends of the cation exchange membrane 2, the cation exchange membrane 3, and the anion exchange membrane 4. Each packing is provided with an opening for liquid flow.
【００１８】各カチオン交換膜３及びアニオン交換膜４
は、図１の通り、外側電極１に最も近いものが最も面積
が大きく、それから中心電極２に近づくほど面積が小さ
くなっている。Each cation exchange membrane 3 and anion exchange membrane 4
As shown in FIG. 1, the area closest to the outer electrode 1 has the largest area, and the area becomes smaller as approaching the center electrode 2.
【００１９】図１の通り、各濃縮室５に濃縮水を導入配
管１５から並行流として流通させる。一方、希釈水導入
配管１６から、最も外側電極１側の希釈室６及びその直
ぐ内側の希釈室６に希釈水を導入し、この第１，２番目
の希釈室から流出する希釈水を外側電極１から第３番目
の希釈室６と第４番目の希釈室６に導入する。そして、
この第３番目及び第４番目の希釈室６からの流出水を脱
イオン水として取り出す。As shown in FIG. 1, concentrated water flows through each of the concentration chambers 5 from the introduction pipe 15 as a parallel flow. On the other hand, dilution water is introduced from the dilution water introduction pipe 16 into the dilution chamber 6 on the outermost electrode 1 side and the dilution chamber 6 immediately inside the same, and the dilution water flowing out of the first and second dilution chambers is discharged to the outer electrode 1. The first to third dilution chambers 6 and the fourth dilution chamber 6 are introduced. And
The effluent from the third and fourth dilution chambers 6 is taken out as deionized water.
【００２０】中心電極２の面積が外側電極１に比べて小
さいので、電気脱塩装置内の各室５，６内の電流密度は
内側の室ほど大きい。従って、内側の希釈室６から取り
出される脱イオン水（生産水）はきわめて高度に脱イオ
ン処理されたものとなっている。Since the area of the center electrode 2 is smaller than that of the outer electrode 1, the current density in each of the chambers 5 and 6 in the electrodeionization apparatus is larger in the inner chamber. Therefore, the deionized water (produced water) taken out from the inner dilution chamber 6 is highly deionized.
【００２１】なお、前記の通り、この実施の形態にあっ
ては、外側電極１と内側電極２とに沿ってカソード区画
室１１とアノード区画室１２とを形成しており、アノー
ド区画室１２内のＨ+濃度の高い電極水をカソード区画
室１１に導入し、外側電極（カソード）１の表面におけ
る局所的なＯＨ-濃度上昇を解消し、カソード表面への
スケール形成を防止している。ただし、本発明ではかか
るカソード区画室１１及びアノード区画室１２を省略
し、電極１，２に沿って濃縮室及び希釈室を形成しても
良い。また、これら区画室１１，１２に個別に通水して
も良い。カソード区画室１１に導電性スペーサを用いて
も良く、カソード区画室１１内に炭素粒子、金属粒子、
イオン交換体などの導電体を充填しても良い。As described above, in this embodiment, the cathode compartment 11 and the anode compartment 12 are formed along the outer electrode 1 and the inner electrode 2, and the inside of the anode compartment 12 is formed. introducing the H + concentration with high electrode water into the cathode compartment 11, local OH in the outer electrode (cathode) 1 surface - to eliminate the density increase, thereby preventing scale formation on the cathode surface. However, in the present invention, the cathode compartment 11 and the anode compartment 12 may be omitted, and a concentration chamber and a dilution chamber may be formed along the electrodes 1 and 2. Further, water may be individually passed through these compartments 11 and 12. A conductive spacer may be used for the cathode compartment 11, and carbon particles, metal particles,
A conductor such as an ion exchanger may be filled.
【００２２】本発明では、濃縮室５又は希釈室６にイオ
ン交換樹脂又はイオン交換繊維などのイオン交換体を充
填する場合、このイオン交換体を混合充填しても良く、
交互に充填しても良い。In the present invention, when the concentration chamber 5 or the dilution chamber 6 is filled with an ion exchanger such as an ion exchange resin or an ion exchange fiber, the ion exchanger may be mixed and filled.
It may be filled alternately.
【００２３】本発明においては、各希釈室６内の希釈水
の流通速度（筒軸心方向の速度）を等しくするために、
各希釈室６の筒軸心と直交方向の断面積を等しくしても
良い。ただし、各希釈室６の該断面積は異なっていても
良い。In the present invention, in order to make the flow rate (the speed in the direction of the cylinder axis) of the dilution water in each dilution chamber 6 equal,
The cross-sectional area of each dilution chamber 6 in the direction orthogonal to the cylinder axis may be equal. However, the cross-sectional area of each dilution chamber 6 may be different.
【００２４】上記実施の形態にあっては、希釈水は２個
の希釈室６を順次に直列状に流通しているが、３個以上
の希釈室を直列状に流通させても良い。In the above embodiment, the dilution water flows through the two dilution chambers 6 in series, but may flow through three or more dilution chambers in series.
【００２５】上記実施の形態にあっては、濃縮室５に濃
縮水を一過式に流通させているが、希釈水と同様に濃縮
水を各濃縮室に直列状に流通させても良い。この場合、
濃縮水は希釈水と同方向に向って流通されても良く、逆
方向に向って流通されても良い。また、濃縮水は、一度
電気脱塩装置などの処理系の外部に出たものを循環ポン
プ等で再度流通させるようにしても良い。In the above embodiment, the concentrated water is passed through the concentrating chamber 5 in a transient manner, but the concentrated water may be flowed in series in each of the concentrating chambers like the dilution water. in this case,
The concentrated water may flow in the same direction as the dilution water, or may flow in the opposite direction. In addition, the concentrated water that has once come out of a processing system such as an electric desalination apparatus may be recirculated by a circulation pump or the like.
【００２６】上記実施の形態では外側電極１を−電極と
し、中心電極２を＋電極としているが、これを逆にして
も良い。In the above embodiment, the outer electrode 1 is a negative electrode, and the center electrode 2 is a positive electrode.
【００２７】[0027]
【実施例】［実施例１］図１に示す電気脱塩装置におい
て、外側電極（陰性）１を縦６００ｍｍ×直径３２２ｍ
ｍのものとし、中心電極（陽極）２を縦６００ｍｍ×直
径５０ｍｍのものとした。希釈室は２９室配置し、濃縮
室は３０室配置した。希釈水は、水道水を活性炭処理後
ＲＯ処理したものを原水として２個の希釈室を直列に流
通するように通水した。希釈水生産水量は１ｍ3／ｈと
した。希釈室には混床式のイオン交換樹脂を充填した。
濃縮室には何も充填しなかった。各希釈室の水平断面積
は０．０２１ｍ2とした。濃縮水は縦方向からそれぞれ
の室に通過させることとし、循環ポンプを用い一部を捨
て再利用する形で上記ＲＯ処理水を補給し、回収率を８
０％とした。カソード区画室１２からアノード区画室１
１に流す電極水は、上記ＲＯ処理水を用いた。スタック
全体の電圧を１１０Ｖで運転し、このときの電流値は
０．６５Ａであった。[Example 1] In the electric desalination apparatus shown in Fig. 1, the outer electrode (negative) 1 was 600 mm long and 322 m in diameter.
m, and the center electrode (anode) 2 was 600 mm long × 50 mm in diameter. There were 29 dilution chambers and 30 enrichment chambers. The dilution water was passed through two dilution chambers in series using tap water that had been subjected to RO treatment after activated carbon treatment as raw water. The amount of dilution water produced was 1 m 3 / h. The dilution chamber was filled with a mixed bed type ion exchange resin.
Nothing was filled in the concentration room. The horizontal sectional area of each dilution chamber was 0.021 m 2 . The concentrated water is passed through each chamber from the vertical direction, and the above-mentioned RO treated water is replenished by using a circulating pump to discard a part of the water and reuse it.
0%. From the cathode compartment 12 to the anode compartment 1
The above-mentioned RO treated water was used as the electrode water flowing in 1. The entire stack was operated at 110 V, and the current value at this time was 0.65 A.
【００２８】このような装置に通水したところ、表１に
示す水質の原水に対して表２に示す生産水質が得られ
た。When water was passed through such an apparatus, the production water quality shown in Table 2 was obtained with respect to the raw water having the water quality shown in Table 1.
【００２９】［比較例１］各希釈室６に原水を一過式に
流すようにした他は実施例１と同様にして装置を運転し
たところ、表２に示す生産水質が得られた。Comparative Example 1 The apparatus was operated in the same manner as in Example 1 except that the raw water was allowed to flow through each dilution chamber 6 in a transient manner. As a result, the quality of the produced water shown in Table 2 was obtained.
【００３０】[0030]
【表１】 [Table 1]
【００３１】[0031]
【表２】 [Table 2]
【００３２】表２の通り、同一電流を通電し、且つ希釈
水ＬＶ（線速度）を２倍にしても、本発明によれば同一
生産水量にて高水質の生産水を得ることができる。As shown in Table 2, even when the same current is applied and the dilution water LV (linear velocity) is doubled, high-quality water can be obtained with the same amount of water produced according to the present invention.
【００３３】[0033]
【発明の効果】以上の実施例及び比較例からも明らかな
通り、本発明の同軸多室方式の電気脱塩装置によれば、
比較的簡易な構造により、比抵抗が高く、シリカなどの
成分が著しく低減された生産水を得ることができる。As is clear from the above Examples and Comparative Examples, according to the coaxial multi-chamber type electric desalination apparatus of the present invention,
With a relatively simple structure, it is possible to obtain product water having high specific resistance and significantly reduced components such as silica.
【図１】本発明の実施の形態に係る電気脱塩装置の構成
を示す模式的な水平斜視図である。FIG. 1 is a schematic horizontal perspective view showing a configuration of an electric desalination apparatus according to an embodiment of the present invention.
１ 外側電極 ２ 中心電極 ３ カチオン交換膜 ４ アニオン交換膜 ５ 濃縮室 ６ 稀釈室 ６Ａ イオン交換体 １１ カソード区画室 １２ アソード区画室 Reference Signs List 1 outer electrode 2 center electrode 3 cation exchange membrane 4 anion exchange membrane 5 concentration chamber 6 dilution chamber 6A ion exchanger 11 cathode compartment 12 asode compartment
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 4D006 GA17 HA21 HA95 JA18A JA42Z JA44Z JA45Z JA55Z KA01 KA17 KA56 KB11 KB12 KB30 MA02 MA13 MA14 MB07 PA01 PB06 PB23 4D025 AA03 AB17 BA08 BA13 BB04 CA06 DA05 DA06 4D061 DA03 DB13 EA09 EA11 EB13 EB19 EB34 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4D006 GA17 HA21 HA95 JA18A JA42Z JA44Z JA45Z JA55Z KA01 KA17 KA56 KB11 KB12 KB30 MA02 MA13 MA14 MB07 PA01 PB06 PB23 4D025 AA03 AB17 BA08 BA13 BB04 CA06 DA05 DA06 4D061 EB EADB EB34
Claims (2)
に該外側電極と同軸状に配置された中心電極と、該外側
電極と中心電極との間に複数のカチオン交換膜とアニオ
ン交換膜とを交互に同軸状に配列することにより交互に
同軸状に形成された複数の濃縮室及び希釈室とを備えた
電気脱塩装置において、 該外側電極側の希釈室からの流出水をそれよりも内側の
希釈室に流すように少なくとも２つの希釈室を連通した
ことを特徴とする電気脱塩装置。1. A cylindrical outer electrode, a center electrode disposed coaxially with the outer electrode at the center of the outer electrode, and a plurality of cation exchange membranes and anions between the outer electrode and the center electrode. An electrode desalination apparatus comprising a plurality of concentrating chambers and a plurality of diluting chambers formed alternately coaxially by alternately coaxially arranging exchange membranes with the exchange membrane. An electric desalination apparatus characterized in that at least two dilution chambers communicate with each other so as to flow to a dilution chamber located inside.
該電極の軸心線と平行方向に流れるように装置の両端側
に希釈水の流通口が設けられており、且つ該軸心線と平
行方向の希釈水の流れ速度（線速度）が等しくなるよう
に該軸心線と直交方向の各希釈室の断面積を等しくした
ことを特徴とする電気脱塩装置。2. The device according to claim 1, wherein the diluting water is provided at both ends of the apparatus so that the diluting water flows in the diluting chamber in a direction parallel to the axis of the electrode. An electric desalination apparatus characterized in that the cross-sectional areas of the dilution chambers in the direction orthogonal to the axis are equal so that the flow velocity (linear velocity) of the dilution water in the direction parallel to the vertical direction becomes equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11068632A JP2000263058A (en) | 1999-03-15 | 1999-03-15 | Electric desalting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11068632A JP2000263058A (en) | 1999-03-15 | 1999-03-15 | Electric desalting apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000263058A true JP2000263058A (en) | 2000-09-26 |
Family
ID=13379321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11068632A Pending JP2000263058A (en) | 1999-03-15 | 1999-03-15 | Electric desalting apparatus |
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| Country | Link |
|---|---|
| JP (1) | JP2000263058A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006231158A (en) * | 2005-02-23 | 2006-09-07 | Masayoshi Iwahara | Ion exchange membrane and electrode assembly |
| JP2008518749A (en) * | 2004-11-02 | 2008-06-05 | 浙江欧美フアン境工程有限公司 | Folded flow type EDI |
| JP2008191084A (en) * | 2007-02-07 | 2008-08-21 | Toshiba Corp | Cylindrical desalter |
| JP2011525420A (en) * | 2008-06-24 | 2011-09-22 | ソルトワークス テクノロジーズ インコーポレイテッド | Desalination method, apparatus and plant for salt water using concentration difference energy |
| US9751779B1 (en) * | 2016-10-17 | 2017-09-05 | Sultan Qaboos University | Three-electrode structure for capacitive deionization desalination |
-
1999
- 1999-03-15 JP JP11068632A patent/JP2000263058A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008518749A (en) * | 2004-11-02 | 2008-06-05 | 浙江欧美フアン境工程有限公司 | Folded flow type EDI |
| JP4709224B2 (en) * | 2004-11-02 | 2011-06-22 | 浙江欧美フアン境工程有限公司 | Folded flow type EDI |
| US8173003B2 (en) | 2004-11-02 | 2012-05-08 | Zhejiang Omex Environmental Engineering Co., Ltd. | Turn-back flow EDI |
| JP2006231158A (en) * | 2005-02-23 | 2006-09-07 | Masayoshi Iwahara | Ion exchange membrane and electrode assembly |
| JP2008191084A (en) * | 2007-02-07 | 2008-08-21 | Toshiba Corp | Cylindrical desalter |
| JP2011525420A (en) * | 2008-06-24 | 2011-09-22 | ソルトワークス テクノロジーズ インコーポレイテッド | Desalination method, apparatus and plant for salt water using concentration difference energy |
| US9751779B1 (en) * | 2016-10-17 | 2017-09-05 | Sultan Qaboos University | Three-electrode structure for capacitive deionization desalination |
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